Finding the Fourth Proportional to 12,288.50, 16,952.78 and 7,809.85

Step by Step Solution

1. Step 1: Write the proportion equation
   12,288.50 : 16,952.78 = 7,809.85 : x
2. Step 2: Convert to fraction form
   12,288.50/16,952.78 = 7,809.85/x
3. Step 3: Cross multiply
   12,288.50x = 16,952.78 × 7,809.85
4. Step 4: Simplify right side
   12,288.50x = 132,398,668.88
5. Step 5: Solve for x
   x = 132,398,668.88/12,288.50
6. Step 6: Final answer
   x = 10,774.19